LM2903QPWRG4Q1 - Dual 36V Automotive Comparator | TI
MPN: LM2903QPWRG4Q1 ✓ सक्रियLM2903QPWRG4Q1 अवलोकन
A differential comparator compares two input voltages and changes its output state according to the polarity of the difference between them. The LM2903-Q1 family contains two independent comparators, allowing one package to implement two threshold decisions, window monitoring functions, or independent protection channels. Its wide input and supply voltage ranges support battery-derived systems, industrial control boards, and 24 V vehicle electrical environments.
The automotive-qualified LM2903QPWRG4Q1 provides low offset voltage, low supply current, low input bias current, 1.3 microsecond propagation delay, and improved 2 kV ESD performance. Its open-collector outputs allow wired-AND operation with an external pull-up resistor and permit the output voltage to be referenced independently of the internal supply. This makes the device practical for interfacing with logic gates, relay drivers, and systems requiring fail-safe output states.
The LM2903-Q1 family is designed for drop-in convenience with established LM2903-family footprints, helping reduce redesign effort when automotive qualification and a 36 V maximum supply are required. The 8-pin TSSOP package supports compact surface-mount layouts, while the -40 C to +125 C operating range supports harsh industrial and vehicle environments.
Typical uses include automotive battery monitoring, overvoltage and undervoltage detection, fan-speed control, sensor conditioning, power-supply supervision, and industrial control systems. The dual architecture also allows both halves to operate independently, although their input common-mode behavior and output pull-up network must be checked against the system requirements.
When laying out the board, keep comparator inputs away from switching nodes and route the ground reference directly to the device ground pin. Choose the external output pull-up for the required logic family, account for the open-collector sink-current limit, and validate the design across the full temperature range. This page combines manufacturer specifications, package details, verified listing information, drop-in alternatives, and practical design guidance for faster component selection.
के लिए ड्रॉप-इन विकल्प LM2903QPWRG4Q1 — समान पैकेज, पिन-टू-पिन संगत। PCB रीवर्क आवश्यक करने वाले भिन्न-पैकेज पार्ट्स शामिल नहीं हैं।
इस सीरीज़ के वेरिएंट
समान श्रृंखला के मॉडल जो ड्रॉप-इन संगत हैं LM2903QPWRG4Q1 (समान फॉर्म फैक्टर और फुटप्रिंट) — इसमें भिन्न Package, Output Type, Operating Temperature Range, Supply Current, Automotive Qualification.
LM2903QPWRQ1
✅ ड्रॉप-इनकीमत के लिए संपर्क करें
डेटाशीट देखें →LM2903DRG4
✅ ड्रॉप-इनकीमत के लिए संपर्क करें
डेटाशीट देखें →LM2903M/NOPB
✅ ड्रॉप-इन📋 संदर्भ विकल्प (कैटलॉग में नहीं)
LM2903PWRG3
✅ ड्रॉप-इनकीमत के लिए संपर्क करें
डेटाशीट देखें →LM2903PT
✅ ड्रॉप-इनकीमत के लिए संपर्क करें
डेटाशीट देखें →LM2903QPWRG4Q1 Maximum Ratings और Electrical Characteristics
| Comparator Type | Dual differential comparator |
| Number of Channels | 2 |
| Supply Voltage Range, Single | 2 V to 36 V |
| Supply Voltage Range, Dual | +/-18 V |
| आउटपुट प्रकार | Open-collector, CMOS/MOS/TTL-compatible |
| Propagation Delay | 1.3 us |
| सप्लाई करंट | 0.4 mA |
| Automotive Qualification | AEC-Q100 Grade 0 and Grade 1 |
| ESD Performance | 2 kV |
| ऑपरेटिंग तापमान रेंज | -40 C to +125 C |
| पैकेज | 8-pin TSSOP (PW), 0.173 inch width |
| माउंटिंग प्रकार | Surface mount |
| Packaging | Tape and reel |
| RoHS Compliance | RoHS compliant |
| REACH Compliance | Unknown |
| Lead-Free Status | Yes |
LM2903QPWRG4Q1 पिन कॉन्फ़िगरेशन
| पिन 1 | OUT1 — Open-collector output of comparator channel 1 |
| पिन 2 | IN1- — Inverting input of comparator channel 1 |
| पिन 3 | IN1+ — Non-inverting input of comparator channel 1 |
| पिन 4 | GND — Ground connection |
| पिन 5 | IN2+ — Non-inverting input of comparator channel 2 |
| पिन 6 | IN2- — Inverting input of comparator channel 2 |
| पिन 7 | OUT2 — Open-collector output of comparator channel 2 |
| पिन 8 | VCC — Positive supply connection |
सामान्य अनुप्रयोग
LM2903QPWRG4Q1 के लिए उपयुक्त है 6 अनुप्रयोगs: Automotive Battery Voltage Monitoring, Industrial Overvoltage Protection, Fan and Motor Speed Control, Power Supply Fault Detection, Sensor Threshold Conditioning, Window Limit and Safety Monitor.
Automotive Battery Voltage Monitoring
The LM2903QPWRG4Q1 fits 12 V and 24 V vehicle battery monitoring because each channel can compare a divided battery voltage against a precision reference. Its 36 V single-supply capability provides margin above nominal automotive rails, while AEC-Q100 Grade 0 and Grade 1 qualification supports harsh-temperature use. One comparator can detect overvoltage and the other undervoltage, with open-collector outputs driving warning LEDs, relay stages, or a controller input through pull-up resistors. The design should include transient protection on the divider outputs and reference pins.
अनुशंसित
Industrial Overvoltage Protection
For 24 V industrial control boards, the LM2903QPWRG4Q1 can supervise a divided supply rail using its 2 V to 36 V operating range. Two independent differential channels support separate high and low threshold decisions, and the open-collector outputs can pull down a shared alarm line. Compared with a rail-to-rail comparator, this device accommodates higher signal levels within its specified input operating region. Use a resistive divider, input clamping, and a local ground return that follows the monitored supply reference.
अनुशंसित
Fan and Motor Speed Control
The two channels of the LM2903QPWRG4Q1 can monitor tachometer or speed-feedback signals independently from a 12 V or 24 V cooling system. One output can act as a fault signal while the other provides a speed threshold indication, and the 1.3 microsecond propagation delay supports prompt switching decisions. Open-collector outputs simplify interfacing to a controller or MOSFET gate-driver input when paired with a suitable pull-up. Protect the tachometer input against motor-transient coupling and keep the comparator ground close to the signal reference.
अनुशंसित
Power Supply Fault Detection
A power-supply protection circuit can use one LM2903QPWRG4Q1 channel to compare a feedback voltage with a reference and the other to detect an abnormal enable or sequencing condition. The 36 V supply capability is useful in 24 V industrial and vehicle auxiliary rails, while the low 0.4 mA supply-current figure reduces overhead in continuously monitored systems. Open-collector outputs allow a wired-OR fault bus and permit the pull-up voltage to be set independently. Select resistor tolerances to control threshold accuracy and account for input offset voltage.
अनुशंसित
Sensor Threshold Conditioning
The LM2903QPWRG4Q1 can convert a ratiometric sensor signal into a digital threshold event when the sensor output is centered around a bias reference. Both channels are independent, allowing one to implement a high limit and the other a low limit. Its differential inputs help reject common-mode noise when the sensing pair is referenced to the same return path. Because the output is open collector, the conditioned event can drive a pull-up-based logic input or participate in a wired-AND network while keeping the interface voltage flexible.
अनुशंसित
Window Limit and Safety Monitor
Two LM2903QPWRG4Q1 channels can define an upper and lower voltage window, with each open-collector output pulling a shared status line low when its own limit is violated. This arrangement is useful for monitoring intermediate rails in control systems, battery packs, and high-voltage industrial equipment. The AEC-Q100 qualification, extended temperature coverage, and 36 V maximum supply separate it from general-purpose comparators in automotive designs. Use matched divider networks, verify input common-mode limits, and include hysteresis to prevent chatter near each threshold.
अनुशंसित
अनुशंसित उत्पादों का सारांश
के लिए इंजीनियरिंग संदर्भ डेटा LM2903QPWRG4Q1 — तुलना, डिज़ाइन मार्गदर्शन और अनुपालन जानकारी।
चयन गाइड
विकल्पों के साथ तुलना
| पैरामीटर | यह उत्पाद | LM2903QPWRQ1 | LM2903DRG4 | LM2903M/NOPB | LM2903PWRG3 | LM2903PT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | International Rectifier | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-TSSOP (PW) | 8-TSSOP (PW) | 8-TSSOP (PW) | 8-TSSOP (PW) | 8-TSSOP (PW) | 8-TSSOP (PW) |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector |
मुख्य विशेषताएँ
- Automotive qualification with high-voltage capability (बनामLM2903DRG4)
- Near-identical pin and functional architecture (बनामLM2903QPWRQ1)
- Wide operating supply for 24V systems (बनामLM2903M/NOPB)
डिज़ाइन नोट्स
The open-collector outputs require an external pull-up resistor on every output that must reach a valid high state. Confirm that the pull-up voltage remains within the receiving device's input limits, that the comparator can sink the pull-up current plus any external load, and that the resulting RC rise time meets the receiver's setup requirement. A missing or incorrectly sized pull-up can leave the output state undefined or produce excessive switching noise.
Route the two comparator inputs as a compact differential pair and connect the IC ground directly to the quiet analog ground reference. Keep switching-node copper, relay contacts, and high-current return paths away from the input pins. Place the threshold divider and any input protection components close to the comparator, and use a short, direct ground connection to minimize comparison errors caused by ground offset.
The specified 36 V maximum supply voltage is an absolute operating limit, not a recommended continuous rail. Automotive and industrial transients can exceed nominal battery voltage, so use suitable input protection, filtering, or a regulator where the rail can overshoot. Verify the absolute maximum ratings, input common-mode range, and temperature-dependent limits in the manufacturer datasheet before applying the device directly to an unprotected supply.
Add hysteresis when the input signal crosses the threshold slowly or contains noise. Otherwise, small offset-voltage and propagation-delay differences can cause output chatter near the switching point. A positive-feedback resistor can establish hysteresis, but its value must preserve the input common-mode range and avoid excessive loading on the sensing node.
अनुपालन जानकारी
Texas Instruments identifies LM2903-Q1 as AEC-Q100 Grade 0 and Grade 1 qualified. RoHS-compliant and lead-free status are indicated in the component comparison listing; other compliance attributes are not confirmed.
